. Digitaria bicornis Lam. Roem. Schult. Syst. Veg. 2:470. 1817.

Racemes 5, digitate, unilateral, 6 cm long, axis 3 cm long. Rachis triquetros, scabrous on margins. Spikelets spreading, in pairs, or in threes. Fertile spikelets pedicelled, 2 or 3 in the cluster. Pedicels filiform, scabrous. Fertile spikelets comprising 1 basal sterile florets, 1 fertile florets, without rhachilla extension; elliptic, 1.5 mm long, falling entire. Glumes dissimilar. Lower glume absent. Upper glume 1.3 mm long, shorter than the spikelet, 3-nerved, membraneous, apex acute, the surface pubescent. Florets: basal sterile florets barren, without palea; lemma elliptic, slightly shorter than spikelet, membraneous, 7-nerved, pubescent, apically anatomosing. Fertile lemma elliptic, as long as spikelet, cartilaginous, 3-nerved, surface striate, margin flat, apex apiculate. Anthers 3, 0.5 mm long, purple. Stigma purple. Caryopsis with adherent pericarp. Notes Found in China, India, Indo-China, Malesia, and Papuasia. Distribution at Sulawesi Southeast: Kendari, Alt. 0 m. Habitat Sand, mixed with Imperata cylindrica. Specimen examined Kjellberg 381 BO.

29.2 . Digitaria bicornis Lam. Roem. Schult. Syst. Veg. 2:470. 1817.

Digitaria barbata Willd. Enum. Pl. 1: 91. 1809. Digitaria barbulata Desv. Mem. Soc. Agric. Angers 1: 166. 1831. Digitaria biformis Willd. Enum. Pl. 1: 92. 1809. Digitaria commutate Schult.f. Mant. 2: 262. 1824. Digitaria diversiflora Swallen. Rhodora 65764: 356. 1963. Digitaria fimbriata Link. Hort. Berol. 1: 226. 1827. Digitaria heterantha Hook.f. Merr. Enum. Philipp. Fl. Pl. 1: 54. 1923. Digitaria queenslandica Henrard. Monogr. Digitaria 612-614, 996. 1950. Plants annual. Culms 40 cm long, erect to decumbent, rooting at the lower nodes, stoloniferous, forming loose mats. Sheaths moderately pilose to glabrous. Ligule 2 mm long, truncate, erose. Blades linear, 10 cm by 5 mm, margin scabrous, apex acute, the surface scaberulous. Inflorescence composed of racemes. Racemes 2- 4, paired, or digitate, sraight, unilateral, 8 cm long. Rachis winged, angular, scabrous on margins. Spikelets in pairs: fertile spikelets pedicelled, 2 in the cluster. Pedicels scabrous. Fertile spikelets comprising 1 basal sterile florets, 1 fertile florets, without rhachilla extension; dorsally compressed, acute, 3 mm long, falling entire. Glumes dissimilar. Lower glume ovate, 0.4 mm long, apex obtuse. Upper glume 1.5 mm long, membraneous, 3-nerved, surface glabrous, margin ciliate, apex acute. Florets: basal sterile florets barren, without significant palea; lemma elliptic, as long as the spikelets, membraneous, 5-nerved, pilose, hairy between nerves, ciliate on margins, acute. Fertile lemma elliptic, 3 mm long, cartilaginous, without keel, 3-nerved; surface smooth, margins flat, apex acute. Anthers 3, 0.6 mm long. Caryopsis 2 mm long, with adherent pericarp. Notes Found in North Africa, China, India, Indo-China, Malesia, Australia, Mexico, and Brazil. Often confused with Digitaria ciliaris Retz. Koeler. Distribution at Sulawesi Central: Palu, Pakuli, Alt. 50 m; Kapopo, Alt. 330 m; Mt. Gawalise, Alt. 255 m. Habitat Weed species, fodder, found along roadsides, disturbed places, waste places, drained soils, cultivated grounds, on sandy riverbanks, sandy sites, wet sand, wet riverbed, dry hillsides, open areas, in soybean and corn fields. Specimen examined Posthumus 2259 BO; Lasut 947 WALL; Papa 298 WALL.

29.3. Digitaria ciliaris Retz. Koeler. Descr. Gram. : 27. 1802.